December 9, 1990 was a Sunday.
December 19th 1990 was a Wednesday.
December 12 can fall on any day of the week.
5 December 1990 was a Wednesday.
December 20, 1990 was on a Thursday.
December 12, 1990 was a Wednesday.
December 7 1990 was a Friday.
December 1, 1990 fell on a Saturday.
December 28, 1990 fell on a Friday.
December 14th, 1990 fell on a Friday.
Sunday
Friday
Wednesday.